Bruker Corporation is a manufacturer of scientific instruments for molecular and materials research, as well as for industrial and applied analysis. It is headquartered in Billerica, Massachusetts and is the publicly traded parent company of Bruker Scientific Instruments and Bruker Energy & Supercon Technologies divisions.In April 2010, Bruker created a Chemical Analysis Division under the Bruker Daltonics subsidiary. This division contains three former Varian product lines: ICPMS systems, laboratory gas chromatography , and GC-triple quadrupole mass spectrometer .In 2012 it sponsored the Fritz Feigl Prize. Wikipedia.
Sklute E.C.,Mount Holyoke College |
Kashyap S.,University of Massachusetts Amherst |
Dyar M.D.,Mount Holyoke College |
Dyar M.D.,Planetary Science Institute |
And 4 more authors.
Physics and Chemistry of Minerals | Year: 2017
Nanophase iron (oxyhydr)oxides are ubiquitous on Earth, globally distributed on Mars, and likely present on numerous other rocky solar system bodies. They are often structurally and, therefore, spectrally distinct from iron (oxyhydr)oxide bulk phases. Because their spectra vary with grain size, they can be difficult to identify or distinguish unless multiple analysis techniques are used in tandem. Yet, most literature reports fail to use multiple techniques or adequately parameterize sample morphology, making it difficult to understand how morphology affects spectral characteristics across techniques. Here, we present transmission electron microscopy, Raman, visible and near-infrared, and mid-infrared attenuated total reflectance data on synthetic, nanophase akaganéite, lepidocrocite, goethite, hematite, ferrihydrite, magnetite, and maghemite. Feature positions are tabulated and compared to those for bulk (oxyhydr)oxides and other nanophase iron (oxyhydr)oxides from the literature. The utility and limitations of each technique in analyzing nanophase iron (oxyhydr)oxides are discussed. Raman, mid-infrared, and visible near-infrared spectra show broadening, loss of some spectral features, and shifted positions compared to bulk phases. Raman and mid-infrared spectroscopies are useful in identifying and distinguishing akaganéite, lepidocrocite, goethite, and hematite, though ferrihydrite, magnetite, and maghemite have overlapped band positions. Visible near-infrared spectroscopy can identify and distinguish among ferrihydrite, magnetite, and maghemite in pure spectra, though akaganéite, lepidocrocite, and goethite can have overlapping bands. It is clear from this work that further understanding of variable spectral features in nanophase iron (oxyhydr)oxides must await additional studies to robustly assess effects of morphology. This study establishes a template for future work. © 2017 Springer-Verlag Berlin Heidelberg
Galinato M.G.I.,University of Michigan |
Whaley C.M.,University of Illinois at Urbana - Champaign |
Roberts D.,Bruker Optics Inc |
Wang P.,Bruker Optics Inc |
Lehnert N.,University of Michigan
European Journal of Inorganic Chemistry | Year: 2011
The mechanism of hydrogen production in [FeFe] hydrogenase remains elusive. However, a species featuring a terminal hydride bound to the distal Fe is thought to be the key intermediate leading to hydrogen production. In this study, density functional theory (DFT) calculations on the terminal (H-term) and bridging (μ-H) hydride isomers of (μ-edt)-[Fe2(PMe 3)4(CO)2H]+ are presented in order to understand the factors affecting their propensity for protonation. Relative to H-term, μ-H is 12.7 kcal/mol more stable, which contributes to its decreased reactivity towards an acid. Potential energy surface (PES) calculations for the reaction of the H-term isomer with 4-nitropyridinium, a proton source, further reveal a lower activation energy barrier (14.5 kcal/mol) for H-term than for μ-H (29 kcal/mol). Besides these energetic considerations, the H-term isomer displays a key molecular orbital (MO <139>) that has a relatively strong hydride (1s) contribution (23%), which is not present in the μ-H isomer. This indicates a potential orbital control of the reaction of the hydride complexes with acid. The lower activation energy barrier and this key MO together control the overall catalytic activity of (μ-edt)[Fe2(PMe3)4(CO)2(H-term)] +. Lastly, Raman and IR spectroscopy were performed in order to probe the ν(Fe-H) stretching mode of the two isomers and their deuterated counterparts. A ν(Fe-H) stretching mode was observed for the μ-H complex at 1220 cm-1. However, the corresponding mode is not observed for the less stable H-term isomer. © 2011 Wiley-VCH Verlag GmbH & Co. KGaA.
Timko M.T.,Worcester Polytechnic Institute |
Wang J.A.,Worcester Polytechnic Institute |
Wang J.A.,National Polytechnic Institute of Mexico |
Burgess J.,Bruker Optics Inc |
And 4 more authors.
Fuel | Year: 2016
A range of different activated carbons was characterized and evaluated for promotion of the oxidative desulfurization (ODS) of JP-8 fuel using H2O2 oxidant and acetic acid. Wood-based carbons activated by acid treatment showed much higher effectiveness than all other carbon types, regardless of source or activation method. Under identical test conditions designed to differentiate material performance, the most effective carbon material yielded 69% oxidation of 2,3-dimethylbenzothiophene (2,3-DMBT) whereas the ineffective materials scarcely out-performed the control (10% oxidation). To understand the characteristics most associated with reaction promotion, the textural, chemical, and defect features of the carbon materials were examined using a battery of techniques. The effective promoters all shared in common high surface areas and high pore volumes; however, surface area and pore volume alone could not explain the observed trends in performance. Investigating surface chemistry, presence of strong acid sites was strongly related to ODS performance. Overall, long-range order was not required for high activity, yet neither were edge defect sites. These results suggest that carbon promotes ODS by formation of percarboxylic acid species at defect sites within the carbon basal planes. Post-reaction analysis of the carbon materials provided evidence to support this explanation. © 2015 Elsevier Ltd. All rights reserved.
Bruker Optics Inc., Billerica, Mass., announces the Bruker SiBrickScan, said to be the first at-line FTIR instrument allowing for the quantification of interstitial oxygen in complete silicon bricks and ingots. In contrast to classical approaches, the SBS does not require the preparation of thin samples, but directly determines the oxygen gradient along the ingot main axis, and is suitable for fast and economic quality control. Interstitial Oxygen quantification by FT-IR spectroscopy (ASTM/SEMI 1188) is a well-known and important analysis method, but limited to thin silicon samples in the low millimeter range. SiBrickScan overcomes this limitation and is reportedly the first commercially available system to determine the oxygen gradient in complete ingots along their major axis without the need for time-consuming and destructive thin sample preparation. SBS makes smart use of a related infrared overtone absorption band combined with reliable and state-of-the-art Bruker technology. Knowing the oxygen gradient of silicon ingots can help to control and optimize the silicon crystallization process, or to identify batches of bad raw material. Therefore, SBS will help to save costs by optimizing product quality and reducing the number of defective wafers. The random sampling of individual ingots can significantly reduce the number of sample preparation efforts required, and it provides relevant information much earlier than previous methods.
Romanolo K.F.,California State University, East Bay |
Romanolo K.F.,Albany Research Center |
Gorski L.,Albany Research Center |
Wang S.,Bruker Optics Inc |
Lauzon C.R.,California State University, East Bay
PLoS ONE | Year: 2015
The use of Fourier Transform-Infrared Spectroscopy (FT-IR) in conjunction with Artificial Neural Network software NeuroDeveloper" was examined for the rapid identification and classification of Listeria species and serotyping of Listeria monocytogenes. A spectral library was created for 245 strains of Listeria spp. to give a biochemical fingerprint from which identification of unknown samples were made. This technology was able to accurately distinguish the Listeria species with 99.03% accuracy. Eleven serotypes of Listeria monocytogenes including 1/2a, 1/2b, and 4b were identified with 96.58% accuracy. In addition, motile and non-motile forms of Listeria were used to create a more robust model for identification. FT-IR coupled with NeuroDeveloper™ appear to be a more accurate and economic choice for rapid identification of pathogenic Listeria spp. than current methods.
Wang P.,Bruker Optics Inc
Microscopy and Microanalysis | Year: 2014
Raman microscopy has unique applications in analyzing small samples and multicomponent systems. It not only provides molecular identification of the materials but also infers many other properties such as crystalline forms, stress and so on. © Microscopy Society of America 2014.
Bruker Optics Inc | Date: 2014-02-12
A spectrometer is provided for acquiring a Raman spectrum from a sample. The spectrometer includes a first laser, a second laser, a detector and a processing device. The first laser is adapted to produce a first laser beam for generating first Raman spectra from the sample. The second laser is adapted to produce a second laser beam for generating second Raman spectra from the sample. The detector is adapted to collect the first Raman spectra and the second Raman spectra. The processing device is adapted to process the collected first and second Raman spectra to provide the Raman spectrum.
PubMed | California State University, East Bay, Albany Research Center and Bruker Optics Inc
Type: Journal Article | Journal: PloS one | Year: 2015
The use of Fourier Transform-Infrared Spectroscopy (FT-IR) in conjunction with Artificial Neural Network software NeuroDeveloper was examined for the rapid identification and classification of Listeria species and serotyping of Listeria monocytogenes. A spectral library was created for 245 strains of Listeria spp. to give a biochemical fingerprint from which identification of unknown samples were made. This technology was able to accurately distinguish the Listeria species with 99.03% accuracy. Eleven serotypes of Listeria monocytogenes including 1/2a, 1/2b, and 4b were identified with 96.58% accuracy. In addition, motile and non-motile forms of Listeria were used to create a more robust model for identification. FT-IR coupled with NeuroDeveloper appear to be a more accurate and economic choice for rapid identification of pathogenic Listeria spp. than current methods.